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+--- Thread: Fuel Cap Breather (/showthread.php?tid=77371)
Re: Fuel Cap Breather - darrsi - 24-02-17
Aaaaaaaaaaarrrrrggghhhhh :wall
Okay, now i have that out the way.
Bike on side stand, sitting slightly uphill outside my work.
Start the bike....cuts out after one second. Repeat this about 5 times.
Put all my gear on, sit on upright bike, start with choke, and it runs for about 20 seconds then just totally cuts out?
Decide to shake the bike from side to side (rather than jump up and down on it) then it starts straight away, and i'm off home again with no problems whatsoever!
What the foc is going on? :'(
The fact it's been sitting outside all day, and then it starts after sloshing the fuel about now brings me back to thinking about moisture/condensation sitting in the carbs again.
It could explain why it ran okay all the way home, whereas if it was electrical would it not play up again at some stage during my journey?
Re: Fuel Cap Breather - Simon.Pieman - 24-02-17
Check the wiring and connectors of the sidestand cutout and make sure the switch isn't covered in cack. If it's the plunger type switch on your bike make sure the plunger is moving freely and not getting stuck, contact cleaner can be used to free these up.
Re: Fuel Cap Breather - darrsi - 24-02-17
(24-02-17, 08:05 PM)esetest link Wrote: Worn ignition maybe .
The bike does eventually start though, and so far in the last few days has run between 20 and 30 seconds before the engine just stops dead.
Horrible thing is, this is gonna turn out to be something really stupid, and probably easy to fix......as soon as i know what the foc is wrong with it?
Re: Fuel Cap Breather - darrsi - 24-02-17
(24-02-17, 08:16 PM)Simon.Pieman link Wrote: Check the wiring and connectors of the sidestand cutout and make sure the switch isn't covered in cack. If it's the plunger type switch on your bike make sure the plunger is moving freely and not getting stuck, contact cleaner can be used to free these up.
Sidestand switch has been bypassed, that was when all this trouble started last summer and it was the prime suspect at the time.
Re: Fuel Cap Breather - red98 - 24-02-17
Mmmmmmm.....ESETEST ...could be onto something there...is the key loose/sloppy in the ignition ?
Agree with you that it will probably be something simple....might be worth by-passing the ignition just to rule this one out....wont cost you anything trying
Re: Fuel Cap Breather - darrsi - 24-02-17
(24-02-17, 08:40 PM)red98 link Wrote: Mmmmmmm.....ESETEST ...could be onto something there...is the key loose/sloppy in the ignition ?
Agree with you that it will probably be something simple....might be worth by-passing the ignition just to rule this one out....wont cost you anything trying
Key feels okay to me.
How would i bypass it?
Re: Fuel Cap Breather - Fazerider - 25-02-17
(24-02-17, 09:19 PM)darrsi link Wrote: [quote author=red98 link=topic=21819.msg253579#msg253579 date=1487965218]
Mmmmmmm.....ESETEST ...could be onto something there...is the key loose/sloppy in the ignition ?
Agree with you that it will probably be something simple....might be worth by-passing the ignition just to rule this one out....wont cost you anything trying
Key feels okay to me.
How would i bypass it?
[/quote]
With the main fuse out, get to the connector bundle under the tank, disconnect the two plugs from the ignition and make up three links to mimic what the switch does in the "on" position (it's fairly clear which ones to link using the diagram in the manual).
Plug the main fuse back in and your bike is on and ready to start.
As you say though, it's odd that the bike doesn't show up any glitches once it's running properly… if it was a dodgy connection it would be vibration sensitive and you'd expect it it cut out occasionally when hitting bumps.
On the other hand, it doesn't sound much like water contamination either, particularly as you should have dissolved any present with your isopropanol dosing regime.
I wonder if it's flooding? Shaking the bike from side to side might have unjammed a stuck float perhaps?
Re: Fuel Cap Breather - darrsi - 25-02-17
(25-02-17, 01:34 PM)Fazerider link Wrote: [quote author=darrsi link=topic=21819.msg253584#msg253584 date=1487967591]
[quote author=red98 link=topic=21819.msg253579#msg253579 date=1487965218]
Mmmmmmm.....ESETEST ...could be onto something there...is the key loose/sloppy in the ignition ?
Agree with you that it will probably be something simple....might be worth by-passing the ignition just to rule this one out....wont cost you anything trying
Key feels okay to me.
How would i bypass it?
[/quote]
With the main fuse out, get to the connector bundle under the tank, disconnect the two plugs from the ignition and make up three links to mimic what the switch does in the "on" position (it's fairly clear which ones to link using the diagram in the manual).
Plug the main fuse back in and your bike is on and ready to start.
As you say though, it's odd that the bike doesn't show up any glitches once it's running properly… if it was a dodgy connection it would be vibration sensitive and you'd expect it it cut out occasionally when hitting bumps.
On the other hand, it doesn't sound much like water contamination either, particularly as you should have dissolved any present with your isopropanol dosing regime.
I wonder if it's flooding? Shaking the bike from side to side might have unjammed a stuck float perhaps?
[/quote]
The thing i find weird is that i have a reasonably trouble free start in the mornings, when the bike is garaged at night, but once left outside work for 9hrs that's when i have the main issues.
I'm trying to give as much detail as possible in case it means anything.
Like on Thursday the bike was on the centre stand, then started once pushed off it, then yesterday it was on the sidestand but only stayed running after "shaking" the bike from side to side.
I know it'll start eventually with perseverance, but for one it's embarrassing, and secondly, it just ain't right.
Re: Fuel Cap Breather - darrsi - 25-02-17
A couple of my mates just popped round my house and i tried starting the bike in front of them and it played up from the off for about 5 minutes until i shook the bike a few times then it started and eventually ran okay.
So on that evidence and procedure we all agreed that i either need to drain the carbs and tank, in case i've picked up some dodgy fuel from somewhere that may have water in it, or just take the bike for a good blast and see if i can burn it off whilst having a little bit of fun at the same time.
I have another week off work to play with although i keep hearing reports of upcoming dreadful weather so i'll have to pick my moment, but i have to get this sorted 'cos it's driving me bonkers.
Re: Fuel Cap Breather - slappy - 25-02-17
With you shaking the bike and then it starting ok I wonder if there is crap in the tank that is settling round the outlet for the petrol tap under the tank. When the bike is stood the crap sinks to the lowest point and restricts the fuel flow.
Or possibly I am talking crap, it has been known
Re: Fuel Cap Breather - darrsi - 25-02-17
(25-02-17, 05:55 PM)slappy link Wrote: With you shaking the bike and then it starting ok I wonder if there is crap in the tank that is settling round the outlet for the petrol tap under the tank. When the bike is stood the crap sinks to the lowest point and restricts the fuel flow.
Or possibly I am talking crap, it has been known
Could be crap, but the way the engine starts then stops dead i have a gut feeling i've picked up water from somewhere.
The bike was in the garage overnight, so not wet at all and the temperature is mild so i can't blame weather conditions this time.
The difference today though was i started the bike in the garage, whereas i would normally wheel it out then put it back on the sidestand.
This movement may be more than enough to slosh the fuel about making it start easier in the mornings, but at work i start it where it's parked.
All still guesswork obviously but i think i'm on the right track.
Once i'd shaken the bike and got it started, i switched off and it was starting no problem at all afterwards.
I can't see why shaking the bike would fix an electrical fault.
Re: Fuel Cap Breather - fazersharp - 25-02-17
(25-02-17, 05:38 PM)darrsi link Wrote: just take the bike for a good blast and see if i can burn it off whilst having a little bit of fun at the same time.
I refer you to the post I made earlier
Quote:« Reply #16 on: 14 February 2017, 1
Have you tried taking it out for a dam good thrashing
Re: Fuel Cap Breather - darrsi - 25-02-17
(25-02-17, 06:24 PM)fazersharp link Wrote: [quote author=darrsi link=topic=21819.msg253644#msg253644 date=1488040706]
just take the bike for a good blast and see if i can burn it off whilst having a little bit of fun at the same time.
I refer you to the post I made earlier
Quote:« Reply #16 on: 14 February 2017, 1[/quote]
Have you tried taking it out for a dam good thrashing
Yeah i know.
Just sods law that i have a week off and all i hear is reports of shite weather, plus i've got torn ligaments in my thumb so it's bloody painful to ride for too long.
Re: Fuel Cap Breather - darrsi - 26-02-17
Thumb hurts far less if you go out for a mate's 50th, and hit all types of alcoholic weirdness for 7hrs.
I don't for one second condone this type of behaviour, it's just silly, but at least i can type this message in a reasonable manner.....eventually.
For the record, torn thumb ligaments hurts like fook, and seriously doesn't feel like it's improving at all......after 4 weeks :'(